<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    *{
        margin: 0;
        padding: 0;
    }
    body{
        background-color: rgb(63, 63, 63);
    }
    .main{
        margin: 30vh auto;
        width: 150px;
        height: 150px;
        border-radius: 50%;
        position: relative;

    }
    .box{
       width: 150px;
       height: 150px;
       border-radius: 50%;
       background-color: rgb(35, 240, 144);
       position: relative;
       overflow: hidden;
       box-shadow: 0 0 10px rgb(36, 36, 36);
    }
    .box::before{
        content: '';
        position: absolute;
        left: -50%;
        width: 300px;
        height:300px;
        border-radius:40%;
        background-color: rgb(255, 255, 255);   
        animation: rotate 8s linear infinite;
    }
    @keyframes rotate{
        0% {
            transform: rotate(0deg);
            top: -100%;
        }
        100% {
            transform: rotate(360deg);
            top:-200%;
        }
    }
</style>
<body>
    <div class="main">
        <div class="box"></div>
    </div>
</body>
</html>